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H. W. MGWRY. ooMPo-BoARD- Patented Jan. 30, 1894. F' .1.

UNITED STATES PATENT Fries'.

HARLEY V. 'MOWRY, OF MINNEAPOLIS, MINNESOTA, ASSIGNORTO WILLIAM H. COOPER,` OF SAME PLACE.

COMP- BOARD SPECIFICATION forming part of v Letters Patent No. 513,710, dated January 30, 1894. Application filed March 7, 1893. Serial No 464,991'. (No specimens.)

' T0 a/ZZ whom t nto/,y concern,.-

Beit known that I, HARLEY W. MoWRY,a citizen of the United States, residing lat Minneapolis, in the county of Hennepin and'State of Minnesota, have invented certain new and useful Improvements in Compo Boards; and

I do hereby declare the following to beafull,

clear, and exact descrlption of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. My invention relates to that class of building material whichhas recently'become known to the trade, under the name of compo-board; and has for its object to provide an improved article of this class.

To this end, the invention consists of the lconstruction hereinafter fully described and particularly defined in the claim.

The invention isillustrated in the accompanying drawings, wherein, like letters referring to like partsy y Figure 1 is a perspective View of a pieceof my compo-board, with some parts removed or broken away. of the compoboard,with some part-s broken away. Fig. 8 is a section on the line X Xof Fig. 2. Fig. 4: is a View similar to Fig. 3, in which asbestus paper is substituted for the straw-board, shown inthe other views, for one of the facings. l I

Referring to Figs. 1v, 2 and 3, A Ay are paper-board facings, composed of straw or wood pulp-board, embracing4 a conglomerate body v' B, inlaid with longitudinal fiat strips O of p wood is herein used as a generic-term,to include any and all of the said mixtures, as an element combining with the cement, to make up the conglomerate body B. The cement is Fig. 2 is aplan View of apiecel finely` divided' preferably composed of glue and Whiting, with or without the addition of wood ashes. The wood ashes are only added when it is desired to have a cement or make up a conglomerate which will set and dry out eX- tremely hard.

. In the manufacture ofthe above described compo-board, the finely divided wood, whether consisting of excelsior, short shav'in'gs or saw-dust, or any two or more of the said elements, is commingled with the liquid cement in a mixing tank, the mixing action being maintained until the elements are'uniformly distributed. The lower facing AV is then laid out on a flat surface, such as a table, or in a suitable form; and the longitudinal-wooden strips C are placed in position thereon. The facings A A are preferably made ofH about thirty-two inches in width, and of any desired length; and the wooden strips C are placed with reference chiefly for convenience in use as nailing strips and the marginal members for making close joints. If the facings be thirty-two inches wide, one of the strips() is placed at each `longitudinal another .in the center Vof the compo-board. After the said strips have thus been placed in position, on the lower facing A, the con glomerateB, while in a plastic condition, is applied to the said lower facing andlled in between the said wooden stri'ps C to the level of thetop surfaces of the same. The'top facing A is then applied, care being first taken t'o spread some of the liquid cement, composed of glue and Whiting, or similar material, over the top surfaces of the strips C. The whole composition is then subjected to light pressure, in any suitable way, until the conglomerate has become thoroughly set and dried out. The adhesive character, given to the conglomerate by the cement, will bind the facings and the wooden strips to the said conglomerate into an integral and solid board. The compo board thus formed, is rigid, strong, durable and water-proof. The conglomerate body made up as described of the cement and inely divided wood, is extremely hard, rigid and tough. The excelsior and shavings are the preferred ingredients for the reason of the long fiber thereby aorded;

anda better conglomerate is afforded, when margin, and

the excelsior and shavings are used, without `the sawdust; but the saw-dust alone may be employed, and a good conglomerate may be obtained by the use ot either the excelsior or shavings, or both, with a considerable quantity of saw-dust. A

The compo-board thus made, is capable of general use, as asubstitute for lath and plaster, inside and outside walls, for rooting with the use of battens over the joints, and generally, Wherever it is desired to have a strong, durable, air-tight and smooth wall, or other surface.

In applying the same to interiors,it is preferable to run the same up anddown, and the 'nailing and binding strips C would be arranged, so as to coincide with the studding, thereby giving a good nailing surface, for securing the compo-board in position.

In case it be desired to make the material {ire-proof, or more or less tire-proof, asbestus paper may be substituted for either one or both of the straw-board or wood-pulp board facings A A', as shown at A2, in Fig. 4.

In case asbestus paper should thus be used for both facings the material'or compo-board as an entirety, will be almost completely tireproof, as the large quantity of cementcommingled with the finely divided wood, to form the conglomerate, renders the same very difficult to burn.

It is obvious that the above described compo-board utilizes a class of material, which y would otherwise go to waste; and for this reason, the same can be made at comparatively low cost..

What I claim, and desire to secure by Letters Patent of the United States, is as follows: A compo-board, comprising a conglomerate body, composed of finely divided wood commingled with cement, longitudinal wooden strips for nailing and binding purposes set therein, and paper board facings embracing said conglomerate body and wooden strips, and secured thereto by adhesion of the said cement, substantially as described.

In testimony whereof Iafx my signature in presence of two witnesses.

HARLEY lV. MOWRY. Witnesses:

J As. F. WILLIAMSON, EMMA F. ELMORE. 

